hi.i have a Wickes wired alarm system.the black and red wires go from the control panel marked "bell" to the bellbox siren.i have bought a new bellbox for the back of the house( Texecom Oddessy 1e),but this needs a 12 volt supply.is there any round this.have tried wiring up to the siren direct-bypassing all the internal workings of the texecom.but still no joy.do i need a sounder(siren)that can run of the black/red wires like the wickes one??